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Finding the Fourth Proportional to 71,791.20, 107,638.20 and 38,062.80

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Solution

The fourth proportional to 71,791.20, 107,638.20 and 38,062.80 is: 57,068.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,791.20 : 107,638.20 = 38,062.80 : x
  2. Step 2: Convert to fraction form
    71,791.20/107,638.20 = 38,062.80/x
  3. Step 3: Cross multiply
    71,791.20x = 107,638.20 × 38,062.80
  4. Step 4: Simplify right side
    71,791.20x = 4,097,011,278.96
  5. Step 5: Solve for x
    x = 4,097,011,278.96/71,791.20
  6. Step 6: Final answer
    x = 57,068.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.